ZPEG Engine Demo

Important Notes:

These are actual results generated using actual 4K Netflix test content. The clips were chosen to produce the most easily perceived differences.

ZPEG typically boosts compression efficiency by 30% on 4K content.

Netflix Bar Scene – 2 Mbs x264

Netflix Bar Scene – 2 Mbs ZPEG Engine

Netflix Bar Scene 2 Mbs x264 vs 2Mbs ZPEG Engine

Netflix Bar Scene – 16 Mbs x264

Netflix Bar Scene – 8 Mbs ZPEG Engine

Netflix Bar Scene – 16 Mbs x264 vs 8 Mbs ZPEG Engine

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The methodology to produce these results:

First line (equal bandwidth to show the extra compression headroom made available by ZPEG):
- Compress selected video to an extremely low bit rate using x264 only
- Compress selected video to the same low bit rate using x264 with ZPEG
- Select one-half off each of the above videos and paste together to make a side-by-side view
Second line (show equal quality bandwidth savings made available by ZPEG):
- Compress selected video to the Netflix selected 4K (actually UHD) transmission rate of 16 Mbs
- Compress selected video to the equivalent visual experience at the lower bandwidth enabled by ZPEG)
- Select one-half off each of the above videos and paste together to make a side-by-side view

Finally, all video sequences were reduced in resolution for easy playback to HD quality (1080p). This makes the artifacts somewhat less visible, but the videos are easily payable on a standard PC platform.

The HD resolution videos are transcoded to a higher bandwidth (CRF 23) so as to not confuse the issue with additional artifacts. The original videos, their renderings and the FFmpeg command scripts are available in 4K 8-bit y4m format on request.